Every map he drew contained a single deliberate error. Not a large one — a road that curved left where it should curve right, a river named for its eastern tributary rather than its source, an elevation marker two metres above the truth. Small enough that no one checked. Large enough, in certain conditions, to matter.
His name was Gregor Fane, and he had been a cartographer for the Ordnance Survey for thirty-one years before the auditors found the discrepancy.
"I began doing it as a protest," he told the review board. "There was a road the council was planning — through the marsh. I altered the drainage contours by three millimetres. They rerouted. I thought that was the end of it."
It was not the end of it.
The habit had persisted beyond its origin. Long after the marsh road was forgotten, Fane continued to introduce his quiet errors into the surveys. He had no agenda. He could not, when pressed, explain the compulsion. Only that putting something false into an official record felt, each time, like a private correction — as though the world itself contained an error he was obligated to address, and this was the closest he could come.
The auditors traced twenty-seven separate alterations across three decades. Eleven had measurable consequences: a pipeline routed three kilometres from its optimal path, a protected zone boundary drawn a hundred metres short, a bridleway recorded as a road in a village where the distinction had mattered for a property dispute running sixteen years.
They asked him if he kept records of what he had changed.
He produced a ledger.
Thirty-one years of entries, each dated, each noting the location and nature of the alteration, and — in a column headed in Fane's small, precise handwriting, reason — a brief explanation.
Most of the reasons were practical. Environmental. A few were personal in ways the board did not press him to elaborate. But the final entry, dated the previous Tuesday — two days before the audit was announced — read only: the first one was wrong. I have spent thirty years trying to find it again.
The review board suspended his accreditation and referred the matter to the Crown Prosecution Service. Fane cooperated fully and declined legal representation.
His ledger has been entered into evidence.
The marsh road was never built. The marsh is still there. In spring it floods exactly as Fane's altered contours suggested it would — which is to say more severely than the original survey indicated — which is to say that on some level, one the board's geologists have declined to formally acknowledge, he was right.